1 /* 2 * $OpenBSD: patch.c,v 1.45 2007/04/18 21:52:24 sobrado Exp $ 3 * $DragonFly: src/usr.bin/patch/patch.c,v 1.10 2008/08/10 23:39:56 joerg Exp $ 4 * $NetBSD: patch.c,v 1.29 2011/09/06 18:25:14 joerg Exp $ 5 */ 6 7 /* 8 * patch - a program to apply diffs to original files 9 * 10 * Copyright 1986, Larry Wall 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following condition is met: 14 * 1. Redistributions of source code must retain the above copyright notice, 15 * this condition and the following disclaimer. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * -C option added in 1998, original code by Marc Espie, based on FreeBSD 30 * behaviour 31 */ 32 33 #include <sys/cdefs.h> 34 __RCSID("$NetBSD: patch.c,v 1.29 2011/09/06 18:25:14 joerg Exp $"); 35 36 #include <sys/types.h> 37 #include <sys/stat.h> 38 39 #include <ctype.h> 40 #include <getopt.h> 41 #include <limits.h> 42 #include <stdio.h> 43 #include <string.h> 44 #include <stdlib.h> 45 #include <unistd.h> 46 47 #include "common.h" 48 #include "util.h" 49 #include "pch.h" 50 #include "inp.h" 51 #include "backupfile.h" 52 #include "pathnames.h" 53 54 mode_t filemode = 0644; 55 56 char buf[MAXLINELEN]; /* general purpose buffer */ 57 size_t buf_len = sizeof(buf); 58 59 bool using_plan_a = true; /* try to keep everything in memory */ 60 bool out_of_mem = false; /* ran out of memory in plan a */ 61 62 #define MAXFILEC 2 63 64 char *filearg[MAXFILEC]; 65 bool ok_to_create_file = false; 66 char *outname = NULL; 67 char *origprae = NULL; 68 char *TMPOUTNAME; 69 char *TMPINNAME; 70 char *TMPREJNAME; 71 char *TMPPATNAME; 72 bool toutkeep = false; 73 bool trejkeep = false; 74 bool warn_on_invalid_line; 75 bool last_line_missing_eol; 76 77 #ifdef DEBUGGING 78 int debug = 0; 79 #endif 80 81 bool force = false; 82 bool batch = false; 83 bool verbose = true; 84 bool reverse = false; 85 bool noreverse = false; 86 bool skip_rest_of_patch = false; 87 int strippath = 957; 88 bool canonicalize = false; 89 bool check_only = false; 90 int diff_type = 0; 91 char *revision = NULL; /* prerequisite revision, if any */ 92 LINENUM input_lines = 0; /* how long is input file in lines */ 93 int posix = 0; /* strict POSIX mode? */ 94 95 static void reinitialize_almost_everything(void); 96 static void get_some_switches(void); 97 static LINENUM locate_hunk(LINENUM); 98 static void abort_context_hunk(void); 99 static void rej_line(int, LINENUM); 100 static void abort_hunk(void); 101 static void apply_hunk(LINENUM); 102 static void init_output(const char *); 103 static void init_reject(const char *); 104 static void copy_till(LINENUM, bool); 105 static bool spew_output(void); 106 static void dump_line(LINENUM, bool); 107 static bool patch_match(LINENUM, LINENUM, LINENUM); 108 static bool similar(const char *, const char *, int); 109 __dead static void usage(void); 110 111 /* true if -E was specified on command line. */ 112 static bool remove_empty_files = false; 113 114 /* true if -R was specified on command line. */ 115 static bool reverse_flag_specified = false; 116 117 /* buffer holding the name of the rejected patch file. */ 118 static char rejname[NAME_MAX + 1]; 119 120 /* buffer for stderr */ 121 static char serrbuf[BUFSIZ]; 122 123 /* how many input lines have been irretractibly output */ 124 static LINENUM last_frozen_line = 0; 125 126 static int Argc; /* guess */ 127 static char **Argv; 128 static int Argc_last; /* for restarting plan_b */ 129 static char **Argv_last; 130 131 static FILE *ofp = NULL; /* output file pointer */ 132 static FILE *rejfp = NULL; /* reject file pointer */ 133 134 static int filec = 0; /* how many file arguments? */ 135 static LINENUM last_offset = 0; 136 static LINENUM maxfuzz = 2; 137 138 /* patch using ifdef, ifndef, etc. */ 139 static bool do_defines = false; 140 /* #ifdef xyzzy */ 141 static char if_defined[128]; 142 /* #ifndef xyzzy */ 143 static char not_defined[128]; 144 /* #else */ 145 static const char else_defined[] = "#else\n"; 146 /* #endif xyzzy */ 147 static char end_defined[128]; 148 149 150 /* Apply a set of diffs as appropriate. */ 151 152 int 153 main(int argc, char *argv[]) 154 { 155 int error = 0, hunk, failed, i, fd; 156 LINENUM where = 0, newwhere, fuzz, mymaxfuzz; 157 const char *tmpdir; 158 char *v; 159 160 setbuf(stderr, serrbuf); 161 for (i = 0; i < MAXFILEC; i++) 162 filearg[i] = NULL; 163 164 /* Cons up the names of the temporary files. */ 165 if ((tmpdir = getenv("TMPDIR")) == NULL || *tmpdir == '\0') 166 tmpdir = _PATH_TMP; 167 for (i = strlen(tmpdir) - 1; i > 0 && tmpdir[i] == '/'; i--) 168 ; 169 i++; 170 if (asprintf(&TMPOUTNAME, "%.*s/patchoXXXXXXXXXX", i, tmpdir) == -1) 171 fatal("cannot allocate memory"); 172 if ((fd = mkstemp(TMPOUTNAME)) < 0) 173 pfatal("can't create %s", TMPOUTNAME); 174 close(fd); 175 176 if (asprintf(&TMPINNAME, "%.*s/patchiXXXXXXXXXX", i, tmpdir) == -1) 177 fatal("cannot allocate memory"); 178 if ((fd = mkstemp(TMPINNAME)) < 0) 179 pfatal("can't create %s", TMPINNAME); 180 close(fd); 181 182 if (asprintf(&TMPREJNAME, "%.*s/patchrXXXXXXXXXX", i, tmpdir) == -1) 183 fatal("cannot allocate memory"); 184 if ((fd = mkstemp(TMPREJNAME)) < 0) 185 pfatal("can't create %s", TMPREJNAME); 186 close(fd); 187 188 if (asprintf(&TMPPATNAME, "%.*s/patchpXXXXXXXXXX", i, tmpdir) == -1) 189 fatal("cannot allocate memory"); 190 if ((fd = mkstemp(TMPPATNAME)) < 0) 191 pfatal("can't create %s", TMPPATNAME); 192 close(fd); 193 194 v = getenv("SIMPLE_BACKUP_SUFFIX"); 195 if (v) 196 simple_backup_suffix = v; 197 else 198 simple_backup_suffix = ORIGEXT; 199 200 /* parse switches */ 201 Argc = argc; 202 Argv = argv; 203 get_some_switches(); 204 205 if (backup_type == none) { 206 if ((v = getenv("PATCH_VERSION_CONTROL")) == NULL) 207 v = getenv("VERSION_CONTROL"); 208 if (v != NULL || !posix) 209 backup_type = get_version(v); /* OK to pass NULL. */ 210 } 211 212 /* make sure we clean up /tmp in case of disaster */ 213 set_signals(0); 214 215 for (open_patch_file(filearg[1]); there_is_another_patch(); 216 reinitialize_almost_everything()) { 217 /* for each patch in patch file */ 218 219 warn_on_invalid_line = true; 220 221 if (outname == NULL) 222 outname = savestr(filearg[0]); 223 224 /* for ed script just up and do it and exit */ 225 if (diff_type == ED_DIFF) { 226 do_ed_script(); 227 continue; 228 } 229 /* initialize the patched file */ 230 if (!skip_rest_of_patch) 231 init_output(TMPOUTNAME); 232 233 /* initialize reject file */ 234 init_reject(TMPREJNAME); 235 236 /* find out where all the lines are */ 237 if (!skip_rest_of_patch) 238 scan_input(filearg[0]); 239 240 /* from here on, open no standard i/o files, because malloc */ 241 /* might misfire and we can't catch it easily */ 242 243 /* apply each hunk of patch */ 244 hunk = 0; 245 failed = 0; 246 out_of_mem = false; 247 while (another_hunk()) { 248 hunk++; 249 fuzz = 0; 250 mymaxfuzz = pch_context(); 251 if (maxfuzz < mymaxfuzz) 252 mymaxfuzz = maxfuzz; 253 if (!skip_rest_of_patch) { 254 do { 255 where = locate_hunk(fuzz); 256 if (hunk == 1 && where == 0 && !force) { 257 /* dwim for reversed patch? */ 258 if (!pch_swap()) { 259 if (fuzz == 0) 260 say("Not enough memory to try swapped hunk! Assuming unswapped.\n"); 261 continue; 262 } 263 reverse = !reverse; 264 /* try again */ 265 where = locate_hunk(fuzz); 266 if (where == 0) { 267 /* didn't find it swapped */ 268 if (!pch_swap()) 269 /* put it back to normal */ 270 fatal("lost hunk on alloc error!\n"); 271 reverse = !reverse; 272 } else if (noreverse) { 273 if (!pch_swap()) 274 /* put it back to normal */ 275 fatal("lost hunk on alloc error!\n"); 276 reverse = !reverse; 277 say("Ignoring previously applied (or reversed) patch.\n"); 278 skip_rest_of_patch = true; 279 } else if (batch) { 280 if (verbose) 281 say("%seversed (or previously applied) patch detected! %s -R.", 282 reverse ? "R" : "Unr", 283 reverse ? "Assuming" : "Ignoring"); 284 } else { 285 ask("%seversed (or previously applied) patch detected! %s -R? [y] ", 286 reverse ? "R" : "Unr", 287 reverse ? "Assume" : "Ignore"); 288 if (*buf == 'n') { 289 ask("Apply anyway? [n] "); 290 if (*buf != 'y') 291 skip_rest_of_patch = true; 292 where = 0; 293 reverse = !reverse; 294 if (!pch_swap()) 295 /* put it back to normal */ 296 fatal("lost hunk on alloc error!\n"); 297 } 298 } 299 } 300 } while (!skip_rest_of_patch && where == 0 && 301 ++fuzz <= mymaxfuzz); 302 303 if (skip_rest_of_patch) { /* just got decided */ 304 if (ferror(ofp) || fclose(ofp)) { 305 say("Error writing %s\n", 306 TMPOUTNAME); 307 error = 1; 308 } 309 ofp = NULL; 310 } 311 } 312 newwhere = pch_newfirst() + last_offset; 313 if (skip_rest_of_patch) { 314 abort_hunk(); 315 failed++; 316 if (verbose) 317 say("Hunk #%d ignored at %ld.\n", 318 hunk, newwhere); 319 } else if (where == 0) { 320 abort_hunk(); 321 failed++; 322 if (verbose) 323 say("Hunk #%d failed at %ld.\n", 324 hunk, newwhere); 325 } else { 326 apply_hunk(where); 327 if (verbose) { 328 say("Hunk #%d succeeded at %ld", 329 hunk, newwhere); 330 if (fuzz != 0) 331 say(" with fuzz %ld", fuzz); 332 if (last_offset) 333 say(" (offset %ld line%s)", 334 last_offset, 335 last_offset == 1L ? "" : "s"); 336 say(".\n"); 337 } 338 } 339 } 340 341 if (out_of_mem && using_plan_a) { 342 Argc = Argc_last; 343 Argv = Argv_last; 344 say("\n\nRan out of memory using Plan A--trying again...\n\n"); 345 if (ofp) 346 fclose(ofp); 347 ofp = NULL; 348 if (rejfp) 349 fclose(rejfp); 350 rejfp = NULL; 351 continue; 352 } 353 if (hunk == 0) 354 fatal("Internal error: hunk should not be 0\n"); 355 356 /* finish spewing out the new file */ 357 if (!skip_rest_of_patch && !spew_output()) { 358 say("Can't write %s\n", TMPOUTNAME); 359 error = 1; 360 } 361 362 /* and put the output where desired */ 363 ignore_signals(); 364 if (!skip_rest_of_patch) { 365 struct stat statbuf; 366 char *realout = outname; 367 368 if (!check_only) { 369 if (move_file(TMPOUTNAME, outname) < 0) { 370 toutkeep = true; 371 realout = TMPOUTNAME; 372 chmod(TMPOUTNAME, filemode); 373 } else 374 chmod(outname, filemode); 375 376 if (remove_empty_files && 377 stat(realout, &statbuf) == 0 && 378 statbuf.st_size == 0) { 379 if (verbose) 380 say("Removing %s (empty after patching).\n", 381 realout); 382 unlink(realout); 383 } 384 } 385 } 386 if (ferror(rejfp) || fclose(rejfp)) { 387 say("Error writing %s\n", rejname); 388 error = 1; 389 } 390 rejfp = NULL; 391 if (failed) { 392 error = 1; 393 if (*rejname == '\0') { 394 if (strlcpy(rejname, outname, 395 sizeof(rejname)) >= sizeof(rejname)) 396 fatal("filename %s is too long\n", outname); 397 if (strlcat(rejname, REJEXT, 398 sizeof(rejname)) >= sizeof(rejname)) 399 fatal("filename %s is too long\n", outname); 400 } 401 if (skip_rest_of_patch) { 402 say("%d out of %d hunks ignored--saving rejects to %s\n", 403 failed, hunk, rejname); 404 } else { 405 say("%d out of %d hunks failed--saving rejects to %s\n", 406 failed, hunk, rejname); 407 } 408 if (!check_only && move_file(TMPREJNAME, rejname) < 0) 409 trejkeep = true; 410 } 411 set_signals(1); 412 } 413 my_exit(error); 414 /* NOTREACHED */ 415 } 416 417 /* Prepare to find the next patch to do in the patch file. */ 418 419 static void 420 reinitialize_almost_everything(void) 421 { 422 re_patch(); 423 re_input(); 424 425 input_lines = 0; 426 last_frozen_line = 0; 427 428 filec = 0; 429 if (!out_of_mem) { 430 free(filearg[0]); 431 filearg[0] = NULL; 432 } 433 434 free(outname); 435 outname = NULL; 436 437 last_offset = 0; 438 diff_type = 0; 439 440 free(revision); 441 revision = NULL; 442 443 reverse = reverse_flag_specified; 444 skip_rest_of_patch = false; 445 446 get_some_switches(); 447 } 448 449 /* Process switches and filenames. */ 450 451 static void 452 get_some_switches(void) 453 { 454 const char *options = "b::B:cCd:D:eEfF:i:lnNo:p:r:RstuvV:x:z:"; 455 static struct option longopts[] = { 456 {"backup", no_argument, 0, 'b'}, 457 {"batch", no_argument, 0, 't'}, 458 {"check", no_argument, 0, 'C'}, 459 {"context", no_argument, 0, 'c'}, 460 {"debug", required_argument, 0, 'x'}, 461 {"directory", required_argument, 0, 'd'}, 462 {"ed", no_argument, 0, 'e'}, 463 {"force", no_argument, 0, 'f'}, 464 {"forward", no_argument, 0, 'N'}, 465 {"fuzz", required_argument, 0, 'F'}, 466 {"ifdef", required_argument, 0, 'D'}, 467 {"input", required_argument, 0, 'i'}, 468 {"ignore-whitespace", no_argument, 0, 'l'}, 469 {"normal", no_argument, 0, 'n'}, 470 {"output", required_argument, 0, 'o'}, 471 {"prefix", required_argument, 0, 'B'}, 472 {"quiet", no_argument, 0, 's'}, 473 {"reject-file", required_argument, 0, 'r'}, 474 {"remove-empty-files", no_argument, 0, 'E'}, 475 {"reverse", no_argument, 0, 'R'}, 476 {"silent", no_argument, 0, 's'}, 477 {"strip", required_argument, 0, 'p'}, 478 {"suffix", required_argument, 0, 'z'}, 479 {"unified", no_argument, 0, 'u'}, 480 {"version", no_argument, 0, 'v'}, 481 {"version-control", required_argument, 0, 'V'}, 482 {"posix", no_argument, &posix, 1}, 483 {NULL, 0, 0, 0} 484 }; 485 int ch; 486 487 rejname[0] = '\0'; 488 Argc_last = Argc; 489 Argv_last = Argv; 490 if (!Argc) 491 return; 492 optreset = optind = 1; 493 while ((ch = getopt_long(Argc, Argv, options, longopts, NULL)) != -1) { 494 switch (ch) { 495 case 'b': 496 if (backup_type == none) 497 backup_type = numbered_existing; 498 if (optarg == NULL) 499 break; 500 if (verbose) 501 say("Warning, the ``-b suffix'' option has been" 502 " obsoleted by the -z option.\n"); 503 /* FALLTHROUGH */ 504 case 'z': 505 /* must directly follow 'b' case for backwards compat */ 506 simple_backup_suffix = savestr(optarg); 507 break; 508 case 'B': 509 origprae = savestr(optarg); 510 break; 511 case 'c': 512 diff_type = CONTEXT_DIFF; 513 break; 514 case 'C': 515 check_only = true; 516 break; 517 case 'd': 518 if (chdir(optarg) < 0) 519 pfatal("can't cd to %s", optarg); 520 break; 521 case 'D': 522 do_defines = true; 523 if (!isalpha((unsigned char)*optarg) && *optarg != '_') 524 fatal("argument to -D is not an identifier\n"); 525 snprintf(if_defined, sizeof if_defined, 526 "#ifdef %s\n", optarg); 527 snprintf(not_defined, sizeof not_defined, 528 "#ifndef %s\n", optarg); 529 snprintf(end_defined, sizeof end_defined, 530 "#endif /* %s */\n", optarg); 531 break; 532 case 'e': 533 diff_type = ED_DIFF; 534 break; 535 case 'E': 536 remove_empty_files = true; 537 break; 538 case 'f': 539 force = true; 540 break; 541 case 'F': 542 maxfuzz = atoi(optarg); 543 break; 544 case 'i': 545 if (++filec == MAXFILEC) 546 fatal("too many file arguments\n"); 547 filearg[filec] = savestr(optarg); 548 break; 549 case 'l': 550 canonicalize = true; 551 break; 552 case 'n': 553 diff_type = NORMAL_DIFF; 554 break; 555 case 'N': 556 noreverse = true; 557 break; 558 case 'o': 559 outname = savestr(optarg); 560 break; 561 case 'p': 562 strippath = atoi(optarg); 563 break; 564 case 'r': 565 if (strlcpy(rejname, optarg, 566 sizeof(rejname)) >= sizeof(rejname)) 567 fatal("argument for -r is too long\n"); 568 break; 569 case 'R': 570 reverse = true; 571 reverse_flag_specified = true; 572 break; 573 case 's': 574 verbose = false; 575 break; 576 case 't': 577 batch = true; 578 break; 579 case 'u': 580 diff_type = UNI_DIFF; 581 break; 582 case 'v': 583 version(); 584 break; 585 case 'V': 586 backup_type = get_version(optarg); 587 break; 588 #ifdef DEBUGGING 589 case 'x': 590 debug = atoi(optarg); 591 break; 592 #endif 593 default: 594 if (ch != '\0') 595 usage(); 596 break; 597 } 598 } 599 Argc -= optind; 600 Argv += optind; 601 602 if (Argc > 0) { 603 filearg[0] = savestr(*Argv++); 604 Argc--; 605 while (Argc > 0) { 606 if (++filec == MAXFILEC) 607 fatal("too many file arguments\n"); 608 filearg[filec] = savestr(*Argv++); 609 Argc--; 610 } 611 } 612 613 if (getenv("POSIXLY_CORRECT") != NULL) 614 posix = 1; 615 } 616 617 static void 618 usage(void) 619 { 620 fprintf(stderr, 621 "usage: patch [-bCcEeflNnRstuv] [-B backup-prefix] [-D symbol] [-d directory]\n" 622 " [-F max-fuzz] [-i patchfile] [-o out-file] [-p strip-count]\n" 623 " [-r rej-name] [-V t | nil | never] [-x number] [-z backup-ext]\n" 624 " [--posix] [origfile [patchfile]]\n" 625 " patch <patchfile\n"); 626 my_exit(EXIT_FAILURE); 627 } 628 629 /* 630 * Attempt to find the right place to apply this hunk of patch. 631 */ 632 static LINENUM 633 locate_hunk(LINENUM fuzz) 634 { 635 LINENUM first_guess = pch_first() + last_offset; 636 LINENUM offset; 637 LINENUM pat_lines = pch_ptrn_lines(); 638 LINENUM max_pos_offset = input_lines - first_guess - pat_lines + 1; 639 LINENUM max_neg_offset = first_guess - last_frozen_line - 1 + pch_context(); 640 641 if (pat_lines == 0) { /* null range matches always */ 642 if (verbose && fuzz == 0 && (diff_type == CONTEXT_DIFF 643 || diff_type == NEW_CONTEXT_DIFF 644 || diff_type == UNI_DIFF)) { 645 say("Empty context always matches.\n"); 646 } 647 return (first_guess); 648 } 649 if (max_neg_offset >= first_guess) /* do not try lines < 0 */ 650 max_neg_offset = first_guess - 1; 651 if (first_guess <= input_lines && patch_match(first_guess, 0, fuzz)) 652 return first_guess; 653 for (offset = 1; ; offset++) { 654 bool check_after = (offset <= max_pos_offset); 655 bool check_before = (offset <= max_neg_offset); 656 657 if (check_after && patch_match(first_guess, offset, fuzz)) { 658 #ifdef DEBUGGING 659 if (debug & 1) 660 say("Offset changing from %ld to %ld\n", 661 last_offset, offset); 662 #endif 663 last_offset = offset; 664 return first_guess + offset; 665 } else if (check_before && patch_match(first_guess, -offset, fuzz)) { 666 #ifdef DEBUGGING 667 if (debug & 1) 668 say("Offset changing from %ld to %ld\n", 669 last_offset, -offset); 670 #endif 671 last_offset = -offset; 672 return first_guess - offset; 673 } else if (!check_before && !check_after) 674 return 0; 675 } 676 } 677 678 /* We did not find the pattern, dump out the hunk so they can handle it. */ 679 680 static void 681 abort_context_hunk(void) 682 { 683 LINENUM i; 684 const LINENUM pat_end = pch_end(); 685 /* 686 * add in last_offset to guess the same as the previous successful 687 * hunk 688 */ 689 const LINENUM oldfirst = pch_first() + last_offset; 690 const LINENUM newfirst = pch_newfirst() + last_offset; 691 const LINENUM oldlast = oldfirst + pch_ptrn_lines() - 1; 692 const LINENUM newlast = newfirst + pch_repl_lines() - 1; 693 const char *stars = (diff_type >= NEW_CONTEXT_DIFF ? " ****" : ""); 694 const char *minuses = (diff_type >= NEW_CONTEXT_DIFF ? " ----" : " -----"); 695 696 fprintf(rejfp, "***************\n"); 697 for (i = 0; i <= pat_end; i++) { 698 switch (pch_char(i)) { 699 case '*': 700 if (oldlast < oldfirst) 701 fprintf(rejfp, "*** 0%s\n", stars); 702 else if (oldlast == oldfirst) 703 fprintf(rejfp, "*** %ld%s\n", oldfirst, stars); 704 else 705 fprintf(rejfp, "*** %ld,%ld%s\n", oldfirst, 706 oldlast, stars); 707 break; 708 case '=': 709 if (newlast < newfirst) 710 fprintf(rejfp, "--- 0%s\n", minuses); 711 else if (newlast == newfirst) 712 fprintf(rejfp, "--- %ld%s\n", newfirst, minuses); 713 else 714 fprintf(rejfp, "--- %ld,%ld%s\n", newfirst, 715 newlast, minuses); 716 break; 717 case '\n': 718 fprintf(rejfp, "%s", pfetch(i)); 719 break; 720 case ' ': 721 case '-': 722 case '+': 723 case '!': 724 fprintf(rejfp, "%c %s", pch_char(i), pfetch(i)); 725 break; 726 default: 727 fatal("fatal internal error in abort_context_hunk\n"); 728 } 729 } 730 } 731 732 static void 733 rej_line(int ch, LINENUM i) 734 { 735 size_t len; 736 const char *line = pfetch(i); 737 738 len = strlen(line); 739 740 fprintf(rejfp, "%c%s", ch, line); 741 if (len == 0 || line[len-1] != '\n') 742 fprintf(rejfp, "\n\\ No newline at end of file\n"); 743 } 744 745 static void 746 abort_hunk(void) 747 { 748 LINENUM i, j, split; 749 int ch1, ch2; 750 const LINENUM pat_end = pch_end(); 751 const LINENUM oldfirst = pch_first() + last_offset; 752 const LINENUM newfirst = pch_newfirst() + last_offset; 753 754 if (diff_type != UNI_DIFF) { 755 abort_context_hunk(); 756 return; 757 } 758 split = -1; 759 for (i = 0; i <= pat_end; i++) { 760 if (pch_char(i) == '=') { 761 split = i; 762 break; 763 } 764 } 765 if (split == -1) { 766 fprintf(rejfp, "malformed hunk: no split found\n"); 767 return; 768 } 769 i = 0; 770 j = split + 1; 771 fprintf(rejfp, "@@ -%ld,%ld +%ld,%ld @@\n", 772 pch_ptrn_lines() ? oldfirst : 0, 773 pch_ptrn_lines(), newfirst, pch_repl_lines()); 774 while (i < split || j <= pat_end) { 775 ch1 = i < split ? pch_char(i) : -1; 776 ch2 = j <= pat_end ? pch_char(j) : -1; 777 if (ch1 == '-') { 778 rej_line('-', i); 779 i++; 780 } else if (ch1 == ' ' && ch2 == ' ') { 781 rej_line(' ', i); 782 i++; 783 j++; 784 } else if (ch1 == '!' && ch2 == '!') { 785 while (i < split && ch1 == '!') { 786 rej_line('-', i); 787 i++; 788 ch1 = i < split ? pch_char(i) : -1; 789 } 790 while (j <= pat_end && ch2 == '!') { 791 rej_line('+', j); 792 j++; 793 ch2 = j <= pat_end ? pch_char(j) : -1; 794 } 795 } else if (ch1 == '*') { 796 i++; 797 } else if (ch2 == '+' || ch2 == ' ') { 798 rej_line(ch2, j); 799 j++; 800 } else { 801 fprintf(rejfp, "internal error on (%ld %ld %ld)\n", 802 i, split, j); 803 rej_line(ch1, i); 804 rej_line(ch2, j); 805 return; 806 } 807 } 808 } 809 810 /* We found where to apply it (we hope), so do it. */ 811 812 static void 813 apply_hunk(LINENUM where) 814 { 815 LINENUM old = 1; 816 const LINENUM lastline = pch_ptrn_lines(); 817 LINENUM new = lastline + 1; 818 #define OUTSIDE 0 819 #define IN_IFNDEF 1 820 #define IN_IFDEF 2 821 #define IN_ELSE 3 822 int def_state = OUTSIDE; 823 const LINENUM pat_end = pch_end(); 824 825 where--; 826 while (pch_char(new) == '=' || pch_char(new) == '\n') 827 new++; 828 829 while (old <= lastline) { 830 if (pch_char(old) == '-') { 831 copy_till(where + old - 1, false); 832 if (do_defines) { 833 if (def_state == OUTSIDE) { 834 fputs(not_defined, ofp); 835 def_state = IN_IFNDEF; 836 } else if (def_state == IN_IFDEF) { 837 fputs(else_defined, ofp); 838 def_state = IN_ELSE; 839 } 840 fputs(pfetch(old), ofp); 841 } 842 last_frozen_line++; 843 old++; 844 } else if (new > pat_end) { 845 break; 846 } else if (pch_char(new) == '+') { 847 copy_till(where + old - 1, false); 848 if (do_defines) { 849 if (def_state == IN_IFNDEF) { 850 fputs(else_defined, ofp); 851 def_state = IN_ELSE; 852 } else if (def_state == OUTSIDE) { 853 fputs(if_defined, ofp); 854 def_state = IN_IFDEF; 855 } 856 } 857 fputs(pfetch(new), ofp); 858 new++; 859 } else if (pch_char(new) != pch_char(old)) { 860 say("Out-of-sync patch, lines %ld,%ld--mangled text or line numbers, maybe?\n", 861 pch_hunk_beg() + old, 862 pch_hunk_beg() + new); 863 #ifdef DEBUGGING 864 say("oldchar = '%c', newchar = '%c'\n", 865 pch_char(old), pch_char(new)); 866 #endif 867 my_exit(2); 868 } else if (pch_char(new) == '!') { 869 copy_till(where + old - 1, false); 870 if (do_defines) { 871 fputs(not_defined, ofp); 872 def_state = IN_IFNDEF; 873 } 874 while (pch_char(old) == '!') { 875 if (do_defines) { 876 fputs(pfetch(old), ofp); 877 } 878 last_frozen_line++; 879 old++; 880 } 881 if (do_defines) { 882 fputs(else_defined, ofp); 883 def_state = IN_ELSE; 884 } 885 while (pch_char(new) == '!') { 886 fputs(pfetch(new), ofp); 887 new++; 888 } 889 } else { 890 if (pch_char(new) != ' ') 891 fatal("Internal error: expected ' '\n"); 892 old++; 893 new++; 894 if (do_defines && def_state != OUTSIDE) { 895 fputs(end_defined, ofp); 896 def_state = OUTSIDE; 897 } 898 } 899 } 900 if (new <= pat_end && pch_char(new) == '+') { 901 copy_till(where + old - 1, false); 902 if (do_defines) { 903 if (def_state == OUTSIDE) { 904 fputs(if_defined, ofp); 905 def_state = IN_IFDEF; 906 } else if (def_state == IN_IFNDEF) { 907 fputs(else_defined, ofp); 908 def_state = IN_ELSE; 909 } 910 } 911 while (new <= pat_end && pch_char(new) == '+') { 912 fputs(pfetch(new), ofp); 913 new++; 914 } 915 } 916 if (do_defines && def_state != OUTSIDE) { 917 fputs(end_defined, ofp); 918 } 919 } 920 921 /* 922 * Open the new file. 923 */ 924 static void 925 init_output(const char *name) 926 { 927 ofp = fopen(name, "w"); 928 if (ofp == NULL) 929 pfatal("can't create %s", name); 930 } 931 932 /* 933 * Open a file to put hunks we can't locate. 934 */ 935 static void 936 init_reject(const char *name) 937 { 938 rejfp = fopen(name, "w"); 939 if (rejfp == NULL) 940 pfatal("can't create %s", name); 941 } 942 943 /* 944 * Copy input file to output, up to wherever hunk is to be applied. 945 * If endoffile is true, treat the last line specially since it may 946 * lack a newline. 947 */ 948 static void 949 copy_till(LINENUM lastline, bool endoffile) 950 { 951 if (last_frozen_line > lastline) 952 fatal("misordered hunks! output would be garbled\n"); 953 while (last_frozen_line < lastline) { 954 if (++last_frozen_line == lastline && endoffile) 955 dump_line(last_frozen_line, !last_line_missing_eol); 956 else 957 dump_line(last_frozen_line, true); 958 } 959 } 960 961 /* 962 * Finish copying the input file to the output file. 963 */ 964 static bool 965 spew_output(void) 966 { 967 int rv; 968 969 #ifdef DEBUGGING 970 if (debug & 256) 971 say("il=%ld lfl=%ld\n", input_lines, last_frozen_line); 972 #endif 973 if (input_lines) 974 copy_till(input_lines, true); /* dump remainder of file */ 975 rv = ferror(ofp) == 0 && fclose(ofp) == 0; 976 ofp = NULL; 977 return rv; 978 } 979 980 /* 981 * Copy one line from input to output. 982 */ 983 static void 984 dump_line(LINENUM line, bool write_newline) 985 { 986 char *s; 987 988 s = ifetch(line, 0); 989 if (s == NULL) 990 return; 991 /* Note: string is not NUL terminated. */ 992 for (; *s != '\n'; s++) 993 putc(*s, ofp); 994 if (write_newline) 995 putc('\n', ofp); 996 } 997 998 /* 999 * Does the patch pattern match at line base+offset? 1000 */ 1001 static bool 1002 patch_match(LINENUM base, LINENUM offset, LINENUM fuzz) 1003 { 1004 LINENUM pline = 1 + fuzz; 1005 LINENUM iline; 1006 LINENUM pat_lines = pch_ptrn_lines() - fuzz; 1007 const char *ilineptr; 1008 const char *plineptr; 1009 short plinelen; 1010 1011 for (iline = base + offset + fuzz; pline <= pat_lines; pline++, iline++) { 1012 ilineptr = ifetch(iline, offset >= 0); 1013 if (ilineptr == NULL) 1014 return false; 1015 plineptr = pfetch(pline); 1016 plinelen = pch_line_len(pline); 1017 if (canonicalize) { 1018 if (!similar(ilineptr, plineptr, plinelen)) 1019 return false; 1020 } else if (strnNE(ilineptr, plineptr, plinelen)) 1021 return false; 1022 if (iline == input_lines) { 1023 /* 1024 * We are looking at the last line of the file. 1025 * If the file has no eol, the patch line should 1026 * not have one either and vice-versa. Note that 1027 * plinelen > 0. 1028 */ 1029 if (last_line_missing_eol) { 1030 if (plineptr[plinelen - 1] == '\n') 1031 return false; 1032 } else { 1033 if (plineptr[plinelen - 1] != '\n') 1034 return false; 1035 } 1036 } 1037 } 1038 return true; 1039 } 1040 1041 /* 1042 * Do two lines match with canonicalized white space? 1043 */ 1044 static bool 1045 similar(const char *a, const char *b, int len) 1046 { 1047 while (len) { 1048 if (isspace((unsigned char)*b)) { /* whitespace (or \n) to match? */ 1049 if (!isspace((unsigned char)*a)) /* no corresponding whitespace? */ 1050 return false; 1051 while (len && isspace((unsigned char)*b) && *b != '\n') 1052 b++, len--; /* skip pattern whitespace */ 1053 while (isspace((unsigned char)*a) && *a != '\n') 1054 a++; /* skip target whitespace */ 1055 if (*a == '\n' || *b == '\n') 1056 return (*a == *b); /* should end in sync */ 1057 } else if (*a++ != *b++) /* match non-whitespace chars */ 1058 return false; 1059 else 1060 len--; /* probably not necessary */ 1061 } 1062 return true; /* actually, this is not reached */ 1063 /* since there is always a \n */ 1064 } 1065